diff options
Diffstat (limited to 'drivers/mtd/nand/edb7312.c')
| -rw-r--r-- | drivers/mtd/nand/edb7312.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/drivers/mtd/nand/edb7312.c b/drivers/mtd/nand/edb7312.c deleted file mode 100644 index 8400d0f..0000000 --- a/drivers/mtd/nand/edb7312.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * drivers/mtd/nand/edb7312.c - * - * Copyright (C) 2002 Marius Gröger (mag@sysgo.de) - * - * Derived from drivers/mtd/nand/autcpu12.c - * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Overview: - * This is a device driver for the NAND flash device found on the - * CLEP7312 board which utilizes the Toshiba TC58V64AFT part. This is - * a 64Mibit (8MiB x 8 bits) NAND flash device. - */ - -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/nand.h> -#include <linux/mtd/partitions.h> -#include <asm/io.h> -#include <mach/hardware.h> /* for CLPS7111_VIRT_BASE */ -#include <asm/sizes.h> -#include <asm/hardware/clps7111.h> - -/* - * MTD structure for EDB7312 board - */ -static struct mtd_info *ep7312_mtd = NULL; - -/* - * Values specific to the EDB7312 board (used with EP7312 processor) - */ -#define EP7312_FIO_PBASE 0x10000000 /* Phys address of flash */ -#define EP7312_PXDR 0x0001 /* - * IO offset to Port B data register - * where the CLE, ALE and NCE pins - * are wired to. - */ -#define EP7312_PXDDR 0x0041 /* - * IO offset to Port B data direction - * register so we can control the IO - * lines. - */ - -/* - * Module stuff - */ - -static unsigned long ep7312_fio_pbase = EP7312_FIO_PBASE; -static void __iomem *ep7312_pxdr = (void __iomem *)EP7312_PXDR; -static void __iomem *ep7312_pxddr = (void __iomem *)EP7312_PXDDR; - -/* - * Define static partitions for flash device - */ -static struct mtd_partition partition_info[] = { - {.name = "EP7312 Nand Flash", - .offset = 0, - .size = 8 * 1024 * 1024} -}; - -#define NUM_PARTITIONS 1 - -/* - * hardware specific access to control-lines - * - * NAND_NCE: bit 0 -> bit 6 (bit 7 = 1) - * NAND_CLE: bit 1 -> bit 4 - * NAND_ALE: bit 2 -> bit 5 - */ -static void ep7312_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) -{ - struct nand_chip *chip = mtd->priv; - - if (ctrl & NAND_CTRL_CHANGE) { - unsigned char bits = 0x80; - - bits |= (ctrl & (NAND_CLE | NAND_ALE)) << 3; - bits |= (ctrl & NAND_NCE) ? 0x00 : 0x40; - - clps_writeb((clps_readb(ep7312_pxdr) & 0xF0) | bits, - ep7312_pxdr); - } - if (cmd != NAND_CMD_NONE) - writeb(cmd, chip->IO_ADDR_W); -} - -/* - * read device ready pin - */ -static int ep7312_device_ready(struct mtd_info *mtd) -{ - return 1; -} - -const char *part_probes[] = { "cmdlinepart", NULL }; - -/* - * Main initialization routine - */ -static int __init ep7312_init(void) -{ - struct nand_chip *this; - const char *part_type = 0; - int mtd_parts_nb = 0; - struct mtd_partition *mtd_parts = 0; - void __iomem *ep7312_fio_base; - - /* Allocate memory for MTD device structure and private data */ - ep7312_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL); - if (!ep7312_mtd) { - printk("Unable to allocate EDB7312 NAND MTD device structure.\n"); - return -ENOMEM; - } - - /* map physical address */ - ep7312_fio_base = ioremap(ep7312_fio_pbase, SZ_1K); - if (!ep7312_fio_base) { - printk("ioremap EDB7312 NAND flash failed\n"); - kfree(ep7312_mtd); - return -EIO; - } - - /* Get pointer to private data */ - this = (struct nand_chip *)(&ep7312_mtd[1]); - - /* Initialize structures */ - memset(ep7312_mtd, 0, sizeof(struct mtd_info)); - memset(this, 0, sizeof(struct nand_chip)); - - /* Link the private data with the MTD structure */ - ep7312_mtd->priv = this; - ep7312_mtd->owner = THIS_MODULE; - - /* - * Set GPIO Port B control register so that the pins are configured - * to be outputs for controlling the NAND flash. - */ - clps_writeb(0xf0, ep7312_pxddr); - - /* insert callbacks */ - this->IO_ADDR_R = ep7312_fio_base; - this->IO_ADDR_W = ep7312_fio_base; - this->cmd_ctrl = ep7312_hwcontrol; - this->dev_ready = ep7312_device_ready; - /* 15 us command delay time */ - this->chip_delay = 15; - - /* Scan to find existence of the device */ - if (nand_scan(ep7312_mtd, 1)) { - iounmap((void *)ep7312_fio_base); - kfree(ep7312_mtd); - return -ENXIO; - } - ep7312_mtd->name = "edb7312-nand"; - mtd_parts_nb = parse_mtd_partitions(ep7312_mtd, part_probes, &mtd_parts, 0); - if (mtd_parts_nb > 0) - part_type = "command line"; - else - mtd_parts_nb = 0; - if (mtd_parts_nb == 0) { - mtd_parts = partition_info; - mtd_parts_nb = NUM_PARTITIONS; - part_type = "static"; - } - - /* Register the partitions */ - printk(KERN_NOTICE "Using %s partition definition\n", part_type); - mtd_device_register(ep7312_mtd, mtd_parts, mtd_parts_nb); - - /* Return happy */ - return 0; -} - -module_init(ep7312_init); - -/* - * Clean up routine - */ -static void __exit ep7312_cleanup(void) -{ - struct nand_chip *this = (struct nand_chip *)&ep7312_mtd[1]; - - /* Release resources, unregister device */ - nand_release(ap7312_mtd); - - /* Release io resource */ - iounmap(this->IO_ADDR_R); - - /* Free the MTD device structure */ - kfree(ep7312_mtd); -} - -module_exit(ep7312_cleanup); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>"); -MODULE_DESCRIPTION("MTD map driver for Cogent EDB7312 board"); |